CN2492965Y

CN2492965Y - Three-phase four-wire phase failure protecting phonetic alarm

Info

Publication number: CN2492965Y
Application number: CN 01205066
Authority: CN
Inventors: 温继廷; 温志国
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-01-22
Filing date: 2001-01-22
Publication date: 2002-05-22
Anticipated expiration: 2011-01-22

Abstract

The utility model discloses a three-phase four-line phase failure protection and voice alarm, which includes resistance voltage reduction, rectification filtering voltage stability, photoelectric coupling, logic judgement and light alarm, and wherein, the photoelectric coupling is divided into two routes: One route is connected with a voice logic judgement circuit connected with a voice integrated circuit and is respectively connected with an amplification circuit and a speaker via plus Sp and minus Sp ; Another route is connected with a protection control logic judgement circuit connected with a control execution circuit connected with a R <232> serial port. The utility model has the advantages of high sensitivity and remote monitoring and is applied to any apparatus of a three-phase four-line power supply with a phase voltage of 220 V.

Description

Three-phase and four-line open phase protection, phonetic alarm

The utility model relates to a kind of electric supply protective device, is three-phase and four-line open phase protection, the phonetic alarm that is used for phase voltage 220V specifically.

At present, the various electric power protection devices that market circulation is used generally are that each manufacturer produces voluntarily, do not have standard to unify approved product.Employed alarm generally adopts the current sample technology, and all is to be used for threephase motor to report to the police, and current sample is that each is put a current transformer mutually, once has electric current to produce when equipment operation.Because the electromagnetic induction of current transformer; producing secondary current in the instrument transformer secondary terminals (has by 5 amperes of a certain proportion of current transformer standards of national regulation; also have each manufacturer to produce voluntarily not have the current transformer of certain proportion relation), gather after the processing and amplifying secondary current with the relay output protection and drive alarm bell, siren or fixing music alarm.Therefore, there is following defective in the current sample protection:

Just have electric current to produce when 1, having only equipment operation, protection is reported to the police just can be in the operation detection state.2, current transformer produces no current when equipment is out of service, and motor is in stand-by state, just need not protect.This mistake is thought and just is when equipment is out of service; because loading on of other continues operation; a phase is blown in your upper level insurance, all use being equilibrated at not of table test three-phase voltage before at this moment just can not starting each time, most of people are direct startups; at this moment alarm is inoperative; because what control protection loop was used is relay normally closed contact, when inactive state, relay normally closed contact is closed; can start, be again that two-phase starts during startup.Behind motor operation, current transformer detects and to be phase shortage to start protective circuit, again control loop is disconnected, just in this start-up course if the load of fully loaded startup just motor may be burnt.So should be further perfect.

The purpose of this utility model provides a kind of three-phase and four-line open phase protection, phonetic alarm, by to voltage sampling, realize to three-phase four-wire power, zero load, have carry, the protection of inductive load, capacitive load reports to the police.

Technic relization scheme of the present utility model is finished like this: three-phase and four-line open phase protection, phonetic alarm, it comprises that sampling respectively gets a line with A, B, C, N, in A, B, three points of incoming cables of C, carry out the rectifying and wave-filtering voltage stabilizing after resistance step-down by same form, the current limliting respectively, through the sampling indication, after the photoelectricity coupling, carry out logic determines, light warning, be divided into two the tunnel: lead up to the voice logic judging circuit through the optical coupling device, connect speech IC, connect amplifying circuit and loud speaker by Sp+, Sp-; Another road connects protection control logic decision circuitry, and protection control executive circuit meets R ₂₃₂Serial ports constitutes.

The characteristics of the utlity model has are: it has the circuit design novelty, circuit structure is reasonable, remove traditional current transformer, several times to tens times of weight savings, remove traditional pilot bulb (electric current 150MA), all adopt LED (electric current 1.3-2.8MA), life-span low in energy consumption is long, and it is about 10g that this alarm adopts 3 2W resistor weight.This alarm response time is fast, less than 1 second, alarm content complete, accurate (150 accuracys rate 100% after tested), handling failure is timely, be provided with serial ports output, can be used for control, also can remote monitoring, sample range is wide, can the interior operate as normal of 110V-270V voltage range.Can protect operation and stand-by equipment.Audio alert is the maximum characteristics of this alarm, can be regardless of national boundaries, is regardless of language, not fixed sound institute, fixing alarm content not, and the user can record arbitrarily according to alarm content, and is ever-changing, follow one's bent, and can be amplified by high-power sound amplifier between warning.

Be further described for accompanying drawing embodiment in conjunction with the utility model.

Fig. 1 is a circuit block diagram of the present utility model.

Fig. 2 is circuit theory diagrams of the present utility model.

By three-phase and four-line open phase protection shown in Fig. 1 block diagram; phonetic alarm; the 220V voltage that it is imported; sampling is with the A phase; the B phase; the C phase; the N line is respectively got a line; in the A phase; the B phase; three of C phases are located; carry out step-down by big resistance resistance voltage drop element 1 respectively; carry out full-wave rectification by rectifying and wave-filtering voltage stabilizing 2 after the current limliting; high frequency; low frequency filtering; voltage stabilizing; voltage stabilizing is connected a resistance sending and receiving optical diode as sampling work indication 3 again at 7.5V; after photoelectronic coupler 4 couplings; it is bright not by light warning 6 demonstrations to enter logic determines 5; export two-way by photoelectricity idol device 7: voice logic judging circuit 8 outputs of leading up to connect the A phase switch of speech ICs 12; by speech IC 12Sp+; Sp-; connect amplifying circuit 13 respectively and connect another road of loud speaker and connect protection control executive circuit 10, by the relay control R of executive circuit by protection control logic decision circuitry 9 ₂₃₂Serial ports 11 contacts are formed a protective circuit.

Wherein A phase, B phase, C are identical circuit form mutually, and be every mutually all by being connect on the switch of speech IC 12 by voice logic judging circuit 8, omitted the description to each phase.

Fig. 2 is three-phase and four-line open phase protection, phonetic alarm circuit theory diagrams.Sampling is respectively got a line with A, B, C, N, and wherein A phase 220V power firestreak inserts the input of resistance R 1, passes through by diode D through the step-down output ₁, D ₂The full-wave rectifying circuit of forming is parallel to capacitor C ₁High frequency filter, C ₂Low frequency filtering is by shunt regulator tube DW ₁Effect under carry out voltage stabilizing, the voltage after the voltage stabilizing is through resistance R ₂Carry out current limliting, by LED ₁With optical coupler IC ₁Light-emitting diode D positive pole be in series, light-emitting diode D negative pole and incoming line N connect to form " bluring " sample circuit, (use voltage-stabiliser tube DW ₁Purpose be sample range can be between 110V-270V can operate as normal.) LED ₁With optical coupler IC ₁Photodiode is luminous, and the expression sample circuit is normal, phototriode BG ₁Conducting when illumination is arranged, voltage is exported at emitter to phototriode BG collector electrode by Vcc, through resistance R ₃Current limliting meets triode BG ₁Base stage, triode BG ₁The positively biased conducting, voltage vcc outputs to resistance R through emitter ₄, R ₆Current limliting inserts integrated circuit (IC) ₂(CD4069) input, resistance R ₅Ground connection when level conversion, is given a negative potential, makes integrated circuit (IC) ₂Input turn-off fast, forward " 0 " to by " 1 ", by logic determines whether the inverter of warning is arranged, when circuit just often, integrated circuit (IC) ₁Conducting, triode BG ₁Conducting, integrated circuit (IC) ₂Input is high electricity " 1 ", output low level " 0 ", triode BG ₂The base stage low level, BG ₂End LED ₂With photoelectrical coupler IC ₃Photodiode D series connection, rhetorical question ends, and does not work LED ₂Be alarm lamp, do not work to normally.Photoelectrical coupler IC ₃The unglazed photograph of phototriode BG end, the output of the emitter of phototriode BG divides a two-way: lead up to resistance R ₉Meet triode BG ₃Base stage, triode BG at this moment ₃Instead end partially, emitter passes through resistance R ₁₀, R ₁₂Be connected in integrated circuit (IC) ₄(CD4069), resistance R ₁₁Ground connection is because IC ₄Input is a low level, and output is a high level, and passes through K switch ₁, K ₂Close speech IC IC ₅Triggering signal be high level " 1 ", because of speech IC to be set to low level effective, with institute's circuit do not trigger, sound circuit do not report to the police, by speech IC IC ₅SP+ connect capacitor C ₃, pass through resistance R ₁₅Be connected to integrated circuit (IC) ₆2 pin, IC ₅SP-meet capacitor C ₄, pass through resistance R ₁₄Connect integrated circuit (IC) ₆3 pin, IC ₅5 pin be connected to capacitor C ₇, pass through resistance R ₁₆Series connection ground connection, and capacitor C ₈Through K switch ₃One termination loudspeaker Y, another termination external loudspeaker is formed voice alarm circuit; By IC ₃The emitter of triode BG is connected to the second the tunnel through diode D ₃-D ₅The light warning output photoelectrical coupler of each phase composition passes through resistance R ₁₇Be connected to triode BG ₄Base stage form the disjunction gate circuit, no matter diode D ₃-D ₅The positive potential output of arbitrary road, triode BG ₄All conductings, diode D under the normal condition ₃-D ₅All instead end triode BG partially ₄By no-output, triode BG ₄Emitter, pass through resistance R ₁₈, R ₂₀Insert integrated circuit (IC) ₇(CD4069) input, resistance R ₁₉Ground connection, output termination integrated circuit (IC) ₈(CD4069) input, output passes through resistance R ₂₁Be connected to the triode BG of compound connection ₅, BG ₆, because integrated circuit (IC) ₇Input is a low level, and output is a level, IC ₈Input is a high level, and output is a low level, triode BG ₅Instead end place BG partially ₆No-output, BG ₆Emitter is succeeded electrical equipment J, the other end ground connection of relay J, and the relay J no-voltage is failure to actuate, the normally closed contact J of protection output ₁, J ₂Closure, equipment normally moves, wherein relay tip J ₁, J ₂Public termination serial ports R ₂₃₂7 pin of CK, contact J ₁1 pin of output termination serial ports CK, contact J ₂9 pin of output termination serial ports CK form a protection control circuit.

Circuit design part with the C phase is mutually identical with A mutually for B, and wherein B phase, C are mutually respectively by diode D ₄, D ₅Backward end and diode D ₃Backward end link to each other, comprise operating state because of belonging to same circuit theory, Therefore, omited B mutually and the description of C circuit connecting form mutually.

The operating state of three-phase and four-line open phase protection, phonetic alarm: when the phase failure of A phase, sample circuit decompression, LED ₁Not luminous with the photodiode no-voltage of photoelectrical coupler, photoelectrical coupler IC ₁The unglazed photograph of phototriode ends BG ₁Triode is anti-inclined to one side, no-output, integrated circuit (IC) ₂Input low level " 0 ", output high level " 1 ", BG ₂The transistor base high level, BG ₂Conducting, emitter have high level output, LED ₂Be alarm lamp, bright, photoelectrical coupler, bright, the phototriode conducting of photodiode, divide two-way:

1, resistor R ₉To BG ₃Transistor base, BG ₃Forward bias, conducting, emitter output high level " 1 " is through resistance R ₁₀, R ₁₂To integrated circuit (IC) ₄The input utmost point, IC ₄(CD4069) output level is effective, triggers the language control circuit, and the warning language alarm of prerecording is sent in work, because of the speech volume of integrated circuit is little, thus add the one-level amplification circuit, by integrated circuit (IC) ₅, SP+, SP-receive capacitor C ₃, C ₄Respectively with R ₁₃, R ₁₄Resistor in series is delivered to IC ₆

Integrated circuit

2,3 pin are through the C of 5 pin ₈Export and connect loud speaker in 2 the tunnel, the one tunnel, another road external sound device is finished language alarm.

2, photoelectrical coupler IC ₃This utmost point of photoelectricity pipe emitter output through diode D ₃, resistance R ₁₇To triode BG ₄Base stage, BG ₄The base stage high level, emitter output is through R ₁₈, R ₂₀, resistor to the series connection integrated circuit (IC) ₇, IC ₈(CD4069) input low level output high level, resistance R ₁₉Ground connection is through resistor R ₂₁To triode BG ₅Base stage, BG ₅Conducting, BG ₆The multiple tube conducting, output high level, relay J and BG ₆Emitter connects high level other end ground connection, forms loop conducting adhesive, relay tip J ₁, J ₂Contact meets serial ports R ₂₃₂1 pin of CK and 9 pin are formed protection control circuit, relay normally open contact J ₁Can use it for anything else J ₂Normally closed contact disconnects, and the equipment of operation is out of service, plays the open phase protection effect.This alarm is not established the hand-reset button, as long as phase breaking alarm, can only recover phase failure line normal till otherwise, to infinitely report to the police down, and also can not make the people think that machine normally misses because of people's mistake resets hand push button, so in case report to the police, after must repairing, alarm automatically resets.

Claims

1, three-phase and four-line open phase protection, phonetic alarm, it is characterized in that, it comprises that sampling respectively gets a line with A, B, C, N, in A, B, three points of incoming cables of C, connect voice logic judging circuit (8), speech IC (12) by resistance step-down (1), rectifying and wave-filtering voltage stabilizing (2), sampling work indication (3), photoelectricity coupling (4), logic determines (5), light warning (6), optical coupling (7) output two tunnel: one tunnel respectively, connect amplifying circuit (13) and loud speaker by Sp+, Sp-; Another road meets protection control logic decision circuitry (9), protection control executive circuit (10) and R ₂₃₂Serial ports (11) constitutes.

2, by the described three-phase and four-line open phase protection of claim 1, phonetic alarm, it is characterized in that the step-down of A phase resistance is to insert big resistance resistance R mutually by A ₁Constitute, by resistance R ₁Meet diode D ₁Positive pole, negative pole meet diode D ₂Negative pole, D ₂Positive pole connect N line and the capacitor C that is connected in parallel ₁, C ₂, voltage-stabiliser tube DW ₁Be connected to rectification, filtering, voltage stabilizing circuit (2) that the N line is formed.

By the described three-phase and four-line open phase protection of claim 1, phonetic alarm, it is characterized in that 3, described sampling work indication (3) is by diode D ₁Negative pole end connects resistance R ₂Be connected to LED ₁Negative pole is connected to photoelectronic coupler (4) IC ₁Light-emitting diode D positive pole, negative pole meets N line, IC ₁Phototriode BG collector electrode connects power Vcc, and emitter passes through resistance R ₃Meet triode BG ₁Base stage.

4, by the described three-phase and four-line open phase protection of claim 1, phonetic alarm, it is characterized in that described logic judging circuit (5) is by triode BG ₁Collector electrode connect power Vcc, emitter passes through resistance R ₄, R ₆Connect integrated circuit (IC) ₂Positive pole is by resistance R ₄, R ₆Between connecting resistance R on the contact ₅Ground connection constitutes.

5, by the described three-phase and four-line open phase protection of claim 1, phonetic alarm, it is characterized in that light warning (6) is by IC ₂Negative pole passes through resistance R ₇Meet triode BG ₂Base stage, collector electrode connects power Vcc, and emitter passes through resistance R ₈Connect LED ₂Positive pole, negative pole meet photoelectronic coupler (7) IC ₃Light-emitting diode D positive pole, light-emitting diode D minus earth, IC ₃Phototriode BG collector electrode connects power Vcc, emitter output two-way.

6, by the described three-phase and four-line open phase protection of claim 1, phonetic alarm, it is characterized in that, by photoelectronic coupler IC ₃Emitter exports one the tunnel for passing through resistance R ₉Meet triode BG ₃Base stage, collector electrode connects power Vcc, and emitter passes through resistance R ₁₀, R ₁₂Connect integrated circuit (IC) ₄Positive pole, negative pole connects K switch ₁The voice logic judging circuit of forming (8) is by K switch ₁Meet speech IC (12) IC ₅On K switch ₂, pass through IC ₅SP+ connect capacitor C ₃, resistance R ₁₃Meet amplifying circuit (13) IC ₆2 pin, SP-meets capacitor C ₄, resistance R ₁₄Meet IC ₆3 pin, 2,3 pin parallel resistance R ₁₅, IC ₆6 pin pass through capacitor C ₈, K switch ₃Connect loud speaker.

7, by the described three-phase and four-line open phase protection of claim 1, phonetic alarm, it is characterized in that, by photoelectronic coupler IC ₃Emitter is exported another road and is met diode D ₃Positive pole, negative pole passes through resistance R ₁₇Meet triode BG ₄Base stage, collector electrode connects power Vcc, emitter connecting resistance R ₁₈, R ₂₀Connect integrated circuit (IC) ₇, IC ₈The protection control logic decision circuitry of forming (9) is passed through resistance R ₂₁Meet triode BG ₅Base stage.

By the described three-phase and four-line open phase protection of claim 1, phonetic alarm, it is characterized in that 8, protection control executive circuit (10) is by the triode BG of compound connection ₅, BG ₆, collector electrode connects power Vcc, BG ₆Emitter is succeeded electrical equipment J and is constituted, by the contact J of relay J ₁, J ₂Public termination serial ports R ₂₃₂(11) 7 pin, J ₁The output termination serial ports R of contact ₂₃₂1 pin of CK, J ₂The output termination serial ports R of contact ₂₃₂9 pin of CK are formed the protection control circuit.

By the described three-phase and four-line open phase protection of claim 1, phonetic alarm, it is characterized in that 9, A, B, C constitute for the same circuits form mutually.